在成人喉的位置相当于颈椎平面为（）。
A.2～4
B.3～5
C.4～6
D.5～7
E.6～8
参考答案：B
用“ if ” 把下列句子连接起来。
1. I will go the park tomorrow. I have time.
2. They stay in the desert. They will see the camels.
3. Tigers are in danger. They attack people.
4. Elephants are thirsty. They go to the river.
5. Giant pandas have no food. They die.
原发不孕
